metals Flashcards
State what is meant by the term electrolysis
The breaking up of an ionic compound using electricity
state why a direct current power supply must be used during electrolysis
So that the products at each electrode can be identified
State what happens to positive ions at the negative electrode during electrolysis
the gain electrons/ are reduces
suggest what would happen to the blue colour of the copper chloride solutions as the electrolysis progressed
it would fade
Describe a test you could carry out on graphene to show that it conducts electricity
explain how metallic bonds hodl the atoms of a metallic element together
the positive metal ions are attracted to the delocalsied electorns
describe a test you could carry out on grpahene to show that it conducts elecricity
connect the graphene into an electrical circuit with a bulk and a batter the bulb should light showing its an electrical ocnductor
Explain how iron structures can be damaged by acid rain
Iron reacts with acid rain to form iron salts and hydrogen
State the term used to describe an ionic component which is used to complete a circuit
Electrolyte
What are the products when a metal reacts with a acid
Metal salt + hydrogen
What are the products of a metal and oxygen
Metaloxide
What are the products of a metal reacting with water
Metal hydroxide + hydrogen
What happens at the negative electrode
The positive ion is attracted to the negative electrode
Reduction reaction
Solid precipitate formed
What happens at the positive electrode
The negative ion is attracted to the positive electrode
Oxidation
Bubbles of gas produced
What is an electrochemical cell
Made by placing two different metals in a salt solution and connected with a wire circuit
